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PIPED UTILITIES Section 02700 15-1207 requirements B. Clean and disinfect all site water systems connected to the domestic water systems in accordance with AWWA Standard C651 and as required by the local Building and Health Department Codes, and EPA. 1. Clean and disinfect industrial water system in addition to the domestic water system. 2. Disinfect existing piping systems as required to provide continuous disinfection upstream to existing valves. At Contractors option, valves may be provided to isolate the existing piping system from the new piping system. C. Domestic water sterilization shall be performed by a licensed "qualified applicator' as required by CAL -EPA Pesticide Enforcement Branch for disinfecting and sterilizing drinking water. D. Disinfecting Agent: Chlorine product that is a registered product with Cal -EPA for use in California potable water lines, such as Bacticide, CAL -EPA Registration No. 37982- 20001. E. Contractor to provide a 1" service valve connected to the system at a point within 2'-0" of its junction with the water supply line. After sterilization is complete Contractor to provide cap at valve. F. Sterilization Procedure to be as follows: 1. Flush pipe system by opening all outlets and letting water flow through the system until clear water flows from all outlets. 2. Inject disinfecting agent to provide a minimum chlorine residual concentration of at least 50 parts per million (ppm) of free chlorine at each outlet. 3. Provide sign at all outlets which reads "Water Sterilization in Progress — Do not operate". Remove signs at conclusion of test. 4. Close all outlets and valves, including valve connecting to water supply line and 1" service valve. Retain treated water in pipe for a minimum of twenty-four hours. Should chlorine residual at pipe extremities be less than 50 PPM at this time, pipe shall be re -chlorinated. As an option, the water systems may be filled with a water -chlorine solution containing a minimum of 200 PPM of chlorine and allowed to stand for three hours. 5. After chlorination, flush lines of chlorinated water and refill from domestic supply. Continue flushing until residual chlorine is less than or equal to 0.2 ppm, or a residual the same as that of the test water. G. Chemical and bacteriological tests shall be conducted by a state -certified laboratory and approved by the local authorities having jurisdiction. H. Submit written report to Health Department as required by State Regulations. Provide a copy of report to Architect prior to completion of project. 12